Tinas Bodacious Bouillabaisse

Name: Tina's Bodacious Bouillabaisse
Ingredients: 1 fennel bulb thinly sliced; 1 large onion chopped; 2 Tbsp oil; 4 clove garlic minced; 1 lb red potatoes scrubbed and diced; 1/3 c fennel fronds chopped; 1 bay leaf; 1/4 tsp saffron; 1 1/2 Tbsp salt; 1/2 tsp black pepper; 9 c fish stock; 3 lb fish (use various kinds) in 1 - 1 1/2 inch pieces; 1 lb mussels scrubbed and debearded; 1 lb shelled shrimp; 2 roma tomatoes seeded and chopped